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| author | Pavel Begunkov <[email protected]> | 2025-11-25 12:33:06 +0000 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2025-11-25 14:03:45 +0000 |
| commit | f6dc5a36195d3f5be769f60d6987150192dfb099 (patch) | |
| tree | 805eb95eb169721771e03cfd43e7e3036d23d8b2 /lib/mpi/mpi-scan.c | |
| parent | io_uring/net: ensure vectored buffer node import is tied to notification (diff) | |
| download | kernel-f6dc5a36195d3f5be769f60d6987150192dfb099.tar.gz kernel-f6dc5a36195d3f5be769f60d6987150192dfb099.zip | |
io_uring: fix mixed cqe overflow handling
I started to see zcrx data corruptions. That turned out to be due
to CQ tail pointing to a stale entry which happened to be from
a zcrx request. I.e. the tail is incremented without the CQE
memory being changed.
The culprit is __io_cqring_overflow_flush() passing "cqe32=true"
to io_get_cqe_overflow() for non-mixed CQE32 setups, which only
expects it to be set for mixed 32B CQEs and not for SETUP_CQE32.
The fix is slightly hacky, long term it's better to unify mixed and
CQE32 handling.
Fixes: e26dca67fde19 ("io_uring: add support for IORING_SETUP_CQE_MIXED")
Signed-off-by: Pavel Begunkov <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'lib/mpi/mpi-scan.c')
0 files changed, 0 insertions, 0 deletions